Hard Disk Scrubber

Overview

Summit's Hard Disk Scrubber is a Free secure delete program designed to help you permanently destroy sensitive data from your PC.
Use Hard Disk Scrubber to overwrite free space on your Windows drives, or to permanently delete files so that they can no longer
be recoverred.

Scrubber Parts

There are 2 basic parts to the Hard Disk Scrubber. The first is the Hard Disk Free Space Scrubbing option, and the second is File
Scrubbing (or File Shredding).

When you scrub a hard disks free space you overwrite unused space that may have been previously in use by other files. Files that
you deleted using the recycle bin, or through Windows can easily be recovered or undeleted using the proper utilities. The hard disk
scrubber will ensure that these utilities can no longer restore files that were previously deleted on your system.

File scrubbing is a way to securely delete existing files on your computer. If you have files that you want to delete permanently then
you can use this utility to get rid of the files so that they can no longer be accessed. Using this utility will ensure that undelete
utilities cannot access the data that was deleted using this program.

File scrubbing can be used during your every day deleting of sensitive documents and files, while disk scrubbing can be used less often.
You may scrub the disk if you used other means of deleting sensitive files.

If you are getting rid of your computer you should scrub the free space. Even if you have formatted the drive and re-installed the OS,
old data can still be recovered!! Make sure that you overwrite your free space before getting rid
of any computer, otherwise you leave yourself open to identity theft and other problems resulting from your old data winding up in the
hands of an unauthorized party.

Scrub Types

The Hard Disk Scrubber v3 offers new scrub types in addition to Normal, and Heavy that were found in earlier versions of the software.
A description of each of these types follows. Each "Scrub Type" is a collection of "Scrub Patterns". The Hard Disk Scrubber offers 6 different
scrub patterns in all. Each pattern is a 512K block of bit data. This data is what is used to overwrite the private data that you are permanently
destroying.

Scrub Patterns

All Zeros

This pattern is a block of all binary 0's

All Ones

This pattern is a block of all binary 1's

Random

This pattern is a randomly generated block

Checkerboard Beginning with Zero

This is a 01010101 block pattern

Checkerboard Beginning with One

This is a 10101010 block pattern

User String

This is a block comprised of a repeated user defined string

Verify (Read)

Will read the previously written pattern to verify it

The above patterns are then arranged into passes to create the different Scrub Types. The Scrub Types are defined below.

Scrub Types

Normal

Single Pass using Random Pattern

Heavy

Three passes, using Zeros, then Ones, then Random

Super

Five passes, using Zeros, Ones, Checkerboard Beginning with Zero, Checkerboard Beginning with One, then Random

User-definable Scrub Type. Any patterns in any order for as many passes as needed.

Advanced Features

With Hard Disk Scrubber v3 you can create your own complex Scrub Types simply by using the integrated custom pattern editor and creating your
own scrub sequences, using any of the above mentioned Scrub Patterns, as many times, and in any order needed. You can also modify the User
String used with the 6th pattern.